* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
}

ul {
  margin: 0;
  padding: 0;
}

li {
  list-style: none;
  margin: 0;
  padding: 0;
}

.clearfix::before,
.clearfix::after {
  content: '';
  display: table;
}

.clearfix::after {
  clear: both;
}